I've noticed that when I hibernate my Dudu7 9.5" 7870 unit, I sometimes lose my 4G connection upon waking. A complete power off takes longer to start, but the 4G connection is restored immediately afterward.
Interestingly, launching Android Auto and connecting it to my phone seems to instantly restore the 4G connection as well. I've tried various troubleshooting steps, but haven't yet found a solution.
